Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2022 Taler Systems SA
4 :
5 : TALER is free software; you can redistribute it and/or modify it under the
6 : terms of the GNU General Public License as published by the Free Software
7 : Foundation; either version 3, or (at your option) any later version.
8 :
9 : TALER is distributed in the hope that it will be useful, but WITHOUT ANY
10 : WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11 : A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12 :
13 : You should have received a copy of the GNU General Public License along with
14 : TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
15 : */
16 : /**
17 : * @file exchangedb/pg_do_reserve_purse.c
18 : * @brief Implementation of the do_reserve_purse function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "platform.h"
22 : #include "taler_error_codes.h"
23 : #include "taler_dbevents.h"
24 : #include "taler_pq_lib.h"
25 : #include "pg_do_reserve_purse.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Function called insert request to merge a purse into a reserve by the
31 : * respective purse merge key. The purse must not have been merged into a
32 : * different reserve.
33 : *
34 : * @param cls the @e cls of this struct with the plugin-specific state
35 : * @param purse_pub purse to merge
36 : * @param merge_sig signature affirming the merge
37 : * @param merge_timestamp time of the merge
38 : * @param reserve_sig signature of the reserve affirming the merge
39 : * @param purse_fee amount to charge the reserve for the purse creation, NULL to use the quota
40 : * @param reserve_pub public key of the reserve to credit
41 : * @param[out] in_conflict set to true if @a purse_pub was merged into a different reserve already
42 : * @param[out] no_reserve set to true if @a reserve_pub is not a known reserve
43 : * @param[out] insufficient_funds set to true if @a reserve_pub has insufficient capacity to create another purse
44 : * @return transaction status code
45 : */
46 : enum GNUNET_DB_QueryStatus
47 13 : TEH_PG_do_reserve_purse (
48 : void *cls,
49 : const struct TALER_PurseContractPublicKeyP *purse_pub,
50 : const struct TALER_PurseMergeSignatureP *merge_sig,
51 : const struct GNUNET_TIME_Timestamp merge_timestamp,
52 : const struct TALER_ReserveSignatureP *reserve_sig,
53 : const struct TALER_Amount *purse_fee,
54 : const struct TALER_ReservePublicKeyP *reserve_pub,
55 : bool *in_conflict,
56 : bool *no_reserve,
57 : bool *insufficient_funds)
58 : {
59 13 : struct PostgresClosure *pg = cls;
60 : struct TALER_Amount zero_fee;
61 : struct TALER_NormalizedPaytoHashP h_payto;
62 : struct GNUNET_TIME_Timestamp reserve_expiration
63 13 : = GNUNET_TIME_absolute_to_timestamp (
64 : GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
65 : pg->idle_reserve_expiration_time));
66 : struct GNUNET_TIME_Timestamp reserve_gc
67 13 : = GNUNET_TIME_absolute_to_timestamp (
68 : GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
69 : pg->legal_reserve_expiration_time));
70 :
71 13 : struct GNUNET_PQ_QueryParam params[] = {
72 13 : GNUNET_PQ_query_param_auto_from_type (purse_pub),
73 13 : GNUNET_PQ_query_param_auto_from_type (merge_sig),
74 13 : GNUNET_PQ_query_param_timestamp (&merge_timestamp),
75 13 : GNUNET_PQ_query_param_timestamp (&reserve_expiration),
76 13 : GNUNET_PQ_query_param_timestamp (&reserve_gc),
77 13 : GNUNET_PQ_query_param_auto_from_type (reserve_sig),
78 13 : GNUNET_PQ_query_param_bool (NULL == purse_fee),
79 13 : TALER_PQ_query_param_amount (pg->conn,
80 : NULL == purse_fee
81 : ? &zero_fee
82 : : purse_fee),
83 13 : GNUNET_PQ_query_param_auto_from_type (reserve_pub),
84 13 : GNUNET_PQ_query_param_auto_from_type (&h_payto),
85 : GNUNET_PQ_query_param_end
86 : };
87 13 : struct GNUNET_PQ_ResultSpec rs[] = {
88 13 : GNUNET_PQ_result_spec_bool ("insufficient_funds",
89 : insufficient_funds),
90 13 : GNUNET_PQ_result_spec_bool ("conflict",
91 : in_conflict),
92 13 : GNUNET_PQ_result_spec_bool ("no_reserve",
93 : no_reserve),
94 : GNUNET_PQ_result_spec_end
95 : };
96 :
97 : {
98 : struct TALER_NormalizedPayto payto_uri;
99 :
100 13 : payto_uri = TALER_reserve_make_payto (pg->exchange_url,
101 : reserve_pub);
102 13 : TALER_normalized_payto_hash (payto_uri,
103 : &h_payto);
104 13 : GNUNET_free (payto_uri.normalized_payto);
105 : }
106 13 : GNUNET_assert (GNUNET_OK ==
107 : TALER_amount_set_zero (pg->currency,
108 : &zero_fee));
109 13 : PREPARE (pg,
110 : "call_reserve_purse",
111 : "SELECT"
112 : " out_no_funds AS insufficient_funds"
113 : ",out_no_reserve AS no_reserve"
114 : ",out_conflict AS conflict"
115 : " FROM exchange_do_reserve_purse"
116 : " ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10);");
117 :
118 13 : return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
119 : "call_reserve_purse",
120 : params,
121 : rs);
122 : }
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